Make cake according to package directions.,Cook in 9x13 inch pan and cold.,While cake is cooking, heat chocolate and spread thinly on wax paper with spatula.,Put in freezer (easier to work with in three sections.,Whip cream.,When nearly whipped, sprinkle 2 Tbsp.,of powdered sugar and 3 envelopes Knox gelatin.,Whip till stiff.,Put 1/2 c. sugar and 1/2 c. water in small pan and bring to a boil for 2 min.,______,Split cake into 2 layers.,Put bottom on serving dish and moisten generously with cooled syrup.,Over this spread 1/3 of whipped topping, then pie cherries.,Put top layer on, prick with fork and apply syrup to this layer.,Use rest of whipped cream to ice cake.,Finish sides and top with triangles of broken chocolate.,Dust with powdered sugar.